JP2014157561A - Light-shielding body detection device and automatic transaction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-shielding body detection device capable of accurately detecting a light-shielding body even under a situation where detection of the light-shielding body is difficult, and provide an automatic transaction device.SOLUTION: A light-shielding body detection device includes: an element arrangement unit that is formed in a polygonal frame; a light-emitting element that is arranged in the vicinity of at least three apexes of the apexes of the polygon in the element arrangement unit and emits light beam; a light-receiving elements that are arranged in each side of the polygon in the element arrangement unit and receive light beam emitted by the light-emitting element; an acquisition unit that acquires the light-receiving result of the light-receiving element when the light-emitting element emits light beam; and a detection unit that detects a light-shielding body on the basis of the light-receiving result acquired by the acquisition unit.

Description

  The present invention relates to a light shield detection device and an automatic transaction device.

  In recent years, various devices for detecting an operation by a person are used, and among them, a touch panel which is an operation display device having a function of displaying a screen is used in various devices. An example of such a touch panel is an optical touch panel, which is mounted on various devices such as an automatic transaction apparatus, an arcade game machine, and a kiosk terminal.

  The optical touch panel can detect a light-shielding body such as a finger or a pen based on a light reception result when emitting a light beam such as infrared rays. However, when there are a plurality of light-shielding bodies on the path of the light beam, etc. In some cases, it is difficult to accurately detect the light shield. Therefore, in recent years, a technique has been developed for accurately detecting a light shield even when there are a plurality of light shields.

  For example, in Patent Documents 1 and 2 below, a technique is disclosed in which an optical unit that emits and receives light is provided at two corners of a quadrangular touch panel, and a user's touch point is specified based on light reception results from light emission from two directions. ing.

JP 2004-185495 A JP 2007-213135 A

  However, when only the light reception result by light emission from two directions is used, it may be difficult to accurately detect the position depending on the positional relationship between the plurality of light shielding members. In an environment where extraneous light is present, the result of light reception may be distorted by extraneous light, and it may be difficult to detect the position of the light shield.

  Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to detect a light shielding body more accurately even in a situation where it is difficult to detect the light shielding body. Another object of the present invention is to provide a new and improved light shielding body detection apparatus and automatic transaction apparatus.

  In order to solve the above-described problem, according to one aspect of the present invention, an element disposition portion formed in a polygonal frame shape and a vicinity of at least three vertices among polygon vertices in the element disposition portion. A light emitting element arranged to emit light, a plurality of light receiving elements arranged on each side of the polygon in the element arrangement portion to receive light emitted by the light emitting element, and when the light emitting element emits light Further, there is provided a light shielding body detection device comprising: an acquisition unit that acquires a light reception result by the light receiving element; and a detection unit that detects a light shielding body based on the light reception result acquired by the acquisition unit.

  The light-shielding body detection apparatus further includes a calculation unit that calculates a light-shielding region where the light beam emitted from the light-emitting element is blocked by the light-shielding body based on the light reception result, the light-emitting element sequentially emits light, and the calculation unit May calculate the light shielding region for each light emitting element, and the detection unit may detect the position and shape of the light shielding body by combining the light shielding regions calculated by the calculation unit.

  The detection unit may detect the position and shape of the light blocking body by combining the light blocking regions for at least three light emitting elements disposed in the vicinity of different apexes.

  The detection unit includes a first region where the light-shielding regions overlap for a first combination including any two of the light-emitting elements, and any two light-emitting elements different from the first combination. The light-shielding body is located in a third region where the light-shielding region overlaps with the second region where the light-shielding region overlaps, and the shape of the third region is detected as the shape of the light-shielding body. Good.

  The light-shielding body detection device further includes a sensing unit that senses a light-receiving element that has received extraneous light based on the light-receiving result, and the detection unit is other than the light-receiving element sensed as having received extraneous light by the sensing unit. The light shield may be detected based on a light reception result by the light receiving element.

  The detection unit detects the light blocking body based on a light reception result by the light receiving element arranged on a side other than the side where the light receiving element sensed as having received extraneous light by the sensing unit. Also good.

  The detection unit includes the light-shielding region for a light-emitting element other than the light-emitting element that can be received by the light-receiving element sensed as having received extraneous light by the sensing unit when emitting light. You may detect the said light-shielding body combining preferentially.

  The light beam has a diffusibility, and the light beam emitted from the light emitting element is disposed in a range in which the light beam diffuses on the side opposite to the apex where the light emitting element is disposed in the element disposition portion. A plurality of the light receiving elements may receive light.

  The element disposition portion may be formed in a quadrangular frame shape, and one light emitting element may be disposed near each vertex of the quadrangular shape in the element disposition portion.

  The light beam may be infrared.

  In order to solve the above-mentioned problem, according to another aspect of the present invention, at least three of the element disposition part formed in a polygonal frame shape and the vertexes of the polygon in the element disposition part A light emitting element disposed near the apex for emitting light, a plurality of light receiving elements disposed on each side of the polygon in the element disposition portion for receiving light emitted by the light emitting element, and the light emitting element for receiving light. An automatic transaction apparatus is provided that includes an acquisition unit that acquires a light reception result of the light receiving element when the light is emitted, and a detection unit that detects a light blocking body based on the light reception result acquired by the acquisition unit.

  As described above, according to the present invention, it is possible to detect the light shielding body more accurately even in a situation where it is difficult to detect the light shielding body.

It is a figure which shows the structure of the automatic transaction apparatus in which the light-shielding body detection apparatus which concerns on embodiment of this invention was included. It is a figure which shows the external appearance structure of the light-shielding body detection apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the internal structure of the light-shielding body detection apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows operation | movement of the light-shielding body detection apparatus which concerns on 1st Embodiment. It is explanatory drawing which shows the 1st candidate area | region which the detection part which concerns on 1st Embodiment detects. It is explanatory drawing which shows the 2nd candidate area | region which the detection part which concerns on 1st Embodiment detects. It is explanatory drawing which shows the specific area | region which the detection part which concerns on 1st Embodiment detects. It is explanatory drawing which shows the detection of the light-shielding body by the light-shielding body detection apparatus which concerns on the comparative example 1. FIG. It is explanatory drawing which shows the detection of the light-shielding body by the light-shielding body detection apparatus concerning the comparative example 2. It is explanatory drawing which shows the detection of the light-shielding body by the light-shielding body detection apparatus concerning the comparative example 2. It is explanatory drawing which shows the detection of the light-shielding body by the light-shielding body detection apparatus which concerns on 1st Embodiment. It is explanatory drawing which shows the detection of the light-shielding body by the light-shielding body detection apparatus concerning the comparative example 2. It is explanatory drawing which shows the detection of the light-shielding body by the light-shielding body detection apparatus which concerns on 1st Embodiment. It is explanatory drawing which shows the malfunctioning by the external light of the light-shielding body detection apparatus concerning the comparative example 3. It is explanatory drawing which shows operation | movement of the light-shielding body detection apparatus which concerns on 2nd Embodiment.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<1. Overview of Shading Element Detection Device According to One Embodiment of the Present Invention>
[1-1. Basic configuration]
The present invention can be implemented in various forms as will be described in detail in “2. First Embodiment” to “3. Second Embodiment” as an example. Below, with reference to FIGS. 1-3, the basic structure of the light-shielding body detection apparatus common in each embodiment is demonstrated first. In the present specification, an example in which the light shielding body detection device is included in the automatic transaction apparatus will be described. May be included.

  FIG. 1 is a diagram illustrating a configuration of an automatic transaction apparatus including a light shielding body detection apparatus according to an embodiment of the present invention. As shown in FIG. 1, the automatic transaction apparatus 1 includes a passbook insertion / extraction port 2, a card insertion / extraction port 3, a coin insertion port 4, a bill insertion port 5, and a light shielding body detection device 10.

  The automatic transaction apparatus 1 is a customer operation type terminal that executes money transactions based on operations by customers of financial institutions. The automatic transaction apparatus 1 is installed in various facilities such as a financial institution sales store, a convenience store, a station premises, a hotel, a hospital, an amusement park, a restaurant, and an office building.

  The passbook insertion / discharge port 2 inserts and discharges the customer's passbook. The card insertion / discharge port 3 inserts and discharges a customer's card. The coin insertion slot 4 has a function as a deposit slot for coins by a customer and a withdrawal slot for coins to the customer. The bill insertion slot 5 has a function as a bill deposit port for customers and a bill withdrawal port for customers.

  The light shielding body detection device 10 has a function as a customer operation unit that detects an operation by a customer. The light-shielding body detection device 10 includes an element that emits and receives light, and detects the operation of the customer by detecting the light shielding by the light-shielding body such as a customer's finger or pen. And the automatic transaction apparatus 1 performs transaction based on the customer operation which the light-shielding body detection apparatus 10 detected. Hereinafter, with reference to FIG. 2, an external configuration of the light shielding body detection device 10 will be described.

  FIG. 2 is a diagram showing an external configuration of the light shielding body detection device 10 according to an embodiment of the present invention. As shown in FIG. 2, the light shield detection device 10 includes light emitting elements 11-1, 11-2, 11-3 and 11-4, and light receiving elements 12 -A, 12 -B, 12 -C and 12 -D. The element arrangement part 19 is included. The light shielding body detection device 10 is installed so as to overlap the display unit 20. The light shielding body detection device 10 calculates a light shielding area 7-1 that is an area where the light emitted from the light emitting element 11-1 is blocked by the light shielding bodies 6A and 6B. Similarly, the light shield detection device 10 includes a light shielding region 7-2 for the light emitting element 11-2, a light shielding region 7-3 for the light emitting element 11-3, and a light shielding region 7-4 for the light emitting element 11-4. calculate. And the light-shielding body detection apparatus 10 detects the light-shielding body 6 based on the light shielding area | region 7-1, 7-2, 7-3, 7-4.

  Hereinafter, the light emitting elements 11-1 to 11-4 are collectively referred to as the light emitting elements 11 when it is not necessary to distinguish them. The light receiving elements 12 </ b> A to 12 </ b> D are collectively referred to as the light receiving elements 12 when it is not necessary to distinguish them. Further, when it is not necessary to distinguish between the light shielding bodies 6A and 6B, they are collectively referred to as the light shielding body 6. Further, when there is no need to particularly distinguish the light shielding regions 7-1, 7-2, 7-3, and 7-4, they are collectively referred to as the light shielding regions 7.

(Display section)
The display unit 20 displays a screen for guiding a customer transaction. For example, the display unit 20 is realized by a CRT (Cathode Ray Tube) display, a liquid crystal display (LCD), or an OLED (Organic Light Emitting Diode).

(Element arrangement part)
The element disposition unit 19 is a frame in which the light emitting element 11 and the light receiving element 12 are disposed, and is formed in a quadrangular frame shape. The element disposition unit 19 is disposed so as to surround the outer periphery of the display unit 20 so as not to obstruct the display unit 20. The light shielding body detection device 10 detects the light shielding body 6 present on the area surrounded by the element arrangement unit 19, that is, on the display unit 20. FIG. 2 shows an example in which the element disposition portion 19 is formed in a quadrangular frame shape, but the element disposition portion 19 is formed in an arbitrary polygonal frame shape such as a triangle or a pentagon. May be.

(Light receiving element)
A plurality of light receiving elements 12 are disposed on each side of the element disposing portion 19 and receive light emitted from the light emitting element 11. The light receiving element 12 outputs a light reception result indicating the amount of light received when the light emitting element 11 emits light to the acquisition unit 14 described later.

  The light receiving element 12 can also receive extraneous light such as the sun, which is a light ray other than the light emitted by the light emitting element 11. In general, the optical touch panel receives malfunctioning light in an environment where extraneous light exists, even if the light beam from the light emitting element 11 is blocked by the light shield 6, a malfunction may occur. Therefore, the light shielding body detection device 10 according to an embodiment of the present invention avoids such a malfunction by the sensing unit 15 described later.

(Light emitting element)
The light emitting element 11 is an element that emits light having diffusibility such as infrared rays and ultraviolet rays. As shown in FIG. 2, one light emitting element 11-1, 11-2, 11-3, and 11-4 is disposed at each of the quadrangular vertices formed by the element disposing portion 19. The light beam emitted from the light emitting element 11 is diffused over the entire region surrounded by the element disposition unit 19, that is, the entire region on the display unit 20. The light beam emitted by the light emitting element 11 is received by the plurality of light receiving elements 12 disposed in the range where the light beam diffuses on the side opposite to the apex where the light emitting element 11 is disposed in the element disposing portion 19. To do. In FIG. 2, the light beam from the light emitting element 11 is diffused 90 degrees. For example, when the light emitting element 11-1 emits light, the light receiving element 12A and the light receiving element 12B receive light.

(Supplement)
In FIG. 2, an example in which the element disposition unit 19 is disposed so as to surround the outer peripheral portion of the display unit 20 is shown, but the element disposition unit 19 may be formed larger than the display unit 20. In this case, the light-shielding body detection device 10 can detect not only the display unit 20 but also the light-shielding body 6 existing in the region surrounded by the element disposition unit 19 outside the display unit 20. Therefore, the light shield detection device 10 can also set a button area that can be input by touching outside the display unit 20.

  2 shows an example in which the light emitting element 11 is arranged at each apex of the element arranging unit 19, but the light emitting element 11 may be arranged at a position slightly deviated from the apex, that is, near the apex. In this case, by emitting the light beam in the same range as when the light emitting element 11 is disposed at the apex, the light shielding body detection device 10 can perform the same operation as when disposed at the apex. Similarly, the light emitting element 11 may be disposed on the side of the element disposition portion 19. Further, as will be described later, when only two light emitting elements 11 are provided, it may be difficult to detect a plurality of light shields 6. Therefore, the light emitting element 11 is disposed in the vicinity of at least three vertices of the polygon vertices in the element disposition portion 19.

  The light receiving element 12 may be a line sensor. In this case, the circuit configuration of the light shield detection device 10 is simple.

  The external configuration of the light shielding body detection device 10 has been described above. Next, the internal configuration of the light shielding body detection device 10 will be described with reference to FIG.

  FIG. 3 is a block diagram showing an internal configuration of the light shielding body detection device 10 according to an embodiment of the present invention. As illustrated in FIG. 3, the light shielding body detection device 10 includes the control unit 13, the light emitting element 11, and the light receiving element 12 described above.

(Control part)
The control unit 13 functions as an arithmetic processing device and a control device, and controls the overall operation in the light shielding body detection device 10 according to various programs. The control unit 13 is realized by, for example, a CPU (Central Processing Unit) and a microprocessor. The control unit 13 may include a ROM (Read Only Memory) that stores programs to be used, calculation parameters, and the like, and a RAM (Random Access Memory) that temporarily stores parameters that change as appropriate.

  More specifically, the control unit 13 controls light emission by the light emitting element 11 and detects the light shield 6 based on the light reception result by the light receiving element 12. In addition, the control unit 13 functions as an acquisition unit 14, a sensing unit 15, a calculation unit 16, and a detection unit 17.

(Acquisition unit 14)
The acquisition unit 14 acquires a light reception result by the light receiving element 12 when the light emitting element 11 emits a light beam. The acquisition unit 14 outputs the acquired light reception result to the sensing unit 15 and the calculation unit 16.

(Sensing unit 15)
The sensing unit 15 senses the light receiving element 12 that has received extraneous light based on the light reception result acquired by the acquisition unit 14. For example, the sensing unit 15 senses the light receiving element 12 having a light receiving amount higher than the threshold when the light emitting element 11 is not emitting light as the light receiving element 12 that has received external light. In addition, the sensing unit 15 may sense the light receiving element 12 that has received extraneous light based on a comparison result between the amount of light received when the light emitting element 11 is not emitting light and the amount of light received when light is emitted. In addition, the sensing unit 15 senses that extraneous light has been received when the amount of light received when the light emitting element 11 emits light is greater than or equal to the threshold when the amount of light received by the light emitting element 11 is received. Also good. The sensing unit 15 outputs a sensing result, which is information indicating the light receiving element 12 that has received extraneous light, to the detection unit 17.

(Calculation unit 16)
The calculation unit 16 calculates a light shielding region where the light beam emitted from the light emitting element 11 is blocked by the light blocking body 6 based on the light reception result acquired by the acquisition unit 14. The light emitting elements 11 emit light one by one in sequence, and the calculation unit 16 calculates a light shielding region for each light reception result when one light emitting element 11 emits light. The light shielding region is a region surrounded by the light emitting element 11 and the two light receiving elements 12 that can receive light adjacent to the light receiving element 12 that cannot receive the light emitted by the light emitting element 11. The light shielding region indicates that the light shielding body 6 exists inside. Here, calculation of the light shielding area will be described with reference to FIG. 2 again.

  As shown in FIG. 2, since the light blocking element 6 does not exist between the light emitting element 11-1 and the light receiving element 12B-1, the light receiving element 12B-1 can receive the light emitted by the light emitting element 11-1. The same applies to the light receiving element 12B-3. On the other hand, since the light shields 6A and 6B exist between the light emitting element 11-1 and the light receiving element 12B-2, the light receiving element 12B-2 cannot receive the light emitted by the light emitting element 11-1. Therefore, the light-shielding region for the light-emitting element 11-1 is a region surrounded by the light-receiving element 11-1 and the light-receiving elements 12B-1 and 12B-3 that are adjacent to the light-receiving element 12B-2 that cannot receive light. (Shading area 7-1).

  The calculation unit 16 outputs information indicating the calculated light shielding area to the detection unit 17.

(Detector 17)
The detection unit 17 detects the light blocking body 6 based on the light reception result acquired by the acquisition unit 14. More specifically, the detection unit 17 detects the position and shape of the light shielding body 6 by combining the light shielding regions calculated by the calculation unit 16. For example, in FIG. 2, the detection unit 17 detects the positions and shapes of the light shielding bodies 6A and 6B by combining the light shielding regions 7-1, 7-2, 7-3, and 7-4. Further, as will be described later, when there are two light emitting elements 11, that is, it is difficult to detect a plurality of light shielding bodies 6 only by combining light shielding regions for the two light emitting elements 11. Therefore, the detection unit 17 detects the position and shape of the light shielding body 6 by combining the light shielding regions for at least three light emitting elements 11 disposed at different vertices.

  When the sensing unit 15 senses the presence of the light receiving element 12 that has received the extraneous light, the detection unit 17 detects the light shielding body 6 based on the light reception result by the light receiving elements 12 other than the light receiving element 12 that has received the extraneous light. To detect. That is, when it is unclear whether the light received by the light receiving element 12 is emitted by the light emitting element 11 or due to extraneous light, the detection unit 17 determines the light reception result of the light shielding body 6 from the light receiving element 12. Not used for detection. For this reason, the light-shielding body detection apparatus 10 can avoid the malfunction in the environment where external light exists.

  Further, the detection unit 17 detects the light shielding body 6 based on the light shielding region calculated based on the light reception result by the light receiving element 12 disposed on a side other than the side where the light receiving element 12 that has received the external light is disposed. It may be detected. That is, the detection unit 17 may not use the light reception result by the light receiving element 12 disposed on the same side as the light receiving element 12 that has received the extraneous light for the detection of the light blocking body 6. Thereby, the detection part 17 can avoid using the light reception result by the light receiving element 12 which can receive extraneous light for the detection of the light-shielding body 6. FIG.

  In addition, the detection unit 17 may detect the light blocking body 6 by preferentially combining the light blocking regions for the light emitting elements 11 other than the light emitting element 11 facing the light receiving element 12 that has received external light. Thereby, the detection part 17 can avoid effectively using the light reception result by the light receiving element 12 which received extraneous light for the detection of the light-shielding body 6. FIG.

  The internal configuration of the light shielding body detection device 10 has been described above.

<2. First Embodiment>
In the present embodiment, the position and shape of the light shielding body 6 can be more accurately detected by combining the light shielding regions 7 for at least three light emitting elements 11. Since the configuration of the present embodiment is as described above, a detailed description thereof is omitted here. Hereinafter, with reference to FIGS. 4 to 7, the operation of the light shielding body detection device 10 will be described.

[2-1. Operation processing]
FIG. 4 is a flowchart showing the operation of the light shielding body detection device 10 according to the first embodiment. As shown in FIG. 4, first, in step S <b> 104, the light emitting element 11-1 emits light based on the control by the control unit 13. The light emitted at this time is received by the light receiving element 12A and the light receiving element 12B disposed on the side opposite to the light emitting element 11-1, as described above with reference to FIG.

  Next, in step S108, the acquisition unit 14 acquires a light reception result by the light receiving element 12. More specifically, in FIG. 2, the acquisition unit 14 receives light from all of the light receiving elements 12A, the light receiving element 12B-2 does not receive light, and the light receiving elements 12B other than the light receiving element 12B-2 receive light. A light reception result indicating that is acquired.

  Next, in Step S <b> 112, the calculation unit 16 calculates the light shielding region 7 based on the light reception result acquired by the acquisition unit 14. More specifically, the calculation unit 16 calculates a light shielding region 7-1 as the light shielding region 7 for the light emitting element 11-1.

  The light shielding body detection device 10 performs the processes from step S104 to S112 described above for all the light emitting elements 11. More specifically, after the light emitting element 11-1, the light emitting elements 11-2, 11-3, and 11-4 emit light in order, and the calculation unit 16 calculates the light shielding regions 7-2, 7-3, and 7-4. .

  Thereafter, the detection unit 17 combines the light shielding regions 7 calculated by the calculation unit 16 to detect the position and shape of the light shielding body 6. Various detection algorithms by the detection unit 17 can be considered. In the following, as an example, the detection unit 17 includes a region where the light shielding region 7 overlaps for the first combination including the two light emitting elements 11 and a light shielding region 7 regarding the second combination including the other two light emitting elements 11. An algorithm for superimposing overlapping areas will be described.

  First, in step S116, the detection unit 17 combines the light shielding regions 7 with respect to the first combination, and detects a region where the two light shielding regions 7 overlap. Hereinafter, this overlapping area is referred to as a first candidate area (first area). The first combination includes any two light emitting elements 11. Here, as an example, the first combination includes the light emitting element 11-3 and the light emitting element 11-4, and the first candidate area detected by the detection unit 17 will be described with reference to FIG.

  FIG. 5 is an explanatory diagram illustrating a first candidate area detected by the detection unit 17 according to the first embodiment. As illustrated in FIG. 5, the detection unit 17 includes a first candidate region 8-1, a light shielding region 7-3 for the light emitting element 11-3, and a light shielding region 7-4 for the light emitting element 11-4. 8-2, 8-3, and 8-4 are detected.

  Here, as illustrated in FIG. 5, the detection unit 17 is configured so that the light shielding bodies 6A and 6B are the first candidate regions 8-1, 8-2, 8-3, and 8-4 only with the first combination. It is only detected that it exists in any place, and its position cannot be specified. In such a case, the detection unit 17 further combines the light shielding regions 7 from different angles by the light emitting elements 11 different from the light emitting elements 11 used in the first combination, as described below. The positions of 6A and 6B can be specified.

  Next, in step S120, the detection unit 17 combines the light shielding regions 7 for the second combination, and detects a region where the two light shielding regions 7 overlap. Hereinafter, this overlapping area is referred to as a second candidate area (second area). The second combination includes any two light emitting elements 11 different from the first combination. Here, as an example, the second combination includes the light emitting element 11-1 and the light emitting element 11-2, and the second candidate area detected by the detection unit 17 will be described with reference to FIG.

  FIG. 6 is an explanatory diagram illustrating a second candidate area detected by the detection unit 17 according to the first embodiment. As illustrated in FIG. 6, the detection unit 17 includes a second candidate region 8-5 in which the light shielding region 7-1 for the light emitting element 11-1 and the light shielding region 7-2 for the light emitting element 11-2 overlap. Detect 8-6.

  In step S124, the detection unit 17 detects the position and shape of the light shield 6 in combination with the first candidate area and the second candidate area. More specifically, the detection unit 17 first detects an area where the first candidate area and the second candidate area overlap. Hereinafter, this overlapping area is referred to as a specific area (third area). Then, the detection unit 17 detects that the light shield 6 is located in the specific area and that the shape of the specific area is the approximate shape of the light shield 6. Here, the specific area detected by the detection unit 17 will be described with reference to FIG.

  FIG. 7 is an explanatory diagram illustrating a specific area detected by the detection unit 17 according to the first embodiment. As illustrated in FIG. 7, the detection unit 17 overlaps the first candidate areas 8-1, 8-2, 8-3 and 8-4 with the second candidate areas 8-5 and 8-6. The specific areas 9-1 and 9-2 are detected. Note that the first candidate region, the second candidate region, and the specific region are different in that they are a portion where two light shielding regions overlap or a portion where at least three light shielding regions overlap. In the detection unit 17, the light shielding bodies 6A and 6B are located in the specific areas 9-1 and 9-2, respectively, and the shape of the specific area 9-1 is a schematic shape of the light shielding body 6A, and the shape of the specific area 9-2. Is detected as the approximate shape of the light shield 6B.

(Supplement)
As described above with reference to FIG. 5, the detection unit 17 detects the light shielding region 7 from another angle even when it is difficult to specify the position only by combining the two light shielding regions 7. Furthermore, the position of the light shielding body 6 is specified by combining. Therefore, the detection unit 17 can detect the position of the light shielding body 6 by combining the light shielding regions 7 for at least three light emitting elements 11 arranged at different vertices.

  In addition to the detection algorithm described above, the detection unit 17 is configured such that the light shield 6 is located in a region where two or more light shielding regions 7 overlap and any of the four light emitting elements 11 does not overlap. However, the shape of the region may be detected as the shape of the light shield 6. Here, the transmission region is a region other than the light shielding region 7 and is a region where light emitted by the light emitting element 11 is not shielded.

  The operation of the light shielding body detection device 10 according to the present embodiment has been described above.

[2-2. Comparison with comparative example]
Next, with reference to FIGS. 8 to 13, effects of the light shielding body detection device 10 according to the present embodiment will be described in comparison with a comparative example.

(Comparative Example 1)
FIG. 8 is an explanatory diagram showing detection of the light shielding body 6 by the light shielding body detection apparatus according to the first comparative example. As shown in FIG. 8, the light-shielding body detection apparatus according to Comparative Example 1 is provided with a plurality of light-emitting elements 111B and 111C and light-receiving elements 112A and 112D on each side. Hereinafter, the light emitting elements 111B and 111C are referred to as the light emitting elements 111 when it is not necessary to distinguish them. The light receiving elements 112A and 112D are referred to as light emitting elements 112 when it is not necessary to distinguish between them. As shown in FIG. 8, in the light shielding body detection device according to Comparative Example 1, the light emitting element 111 is disposed on one of the two opposite sides, and the light receiving element 112 is disposed on the other side. One light receiving element 112 receives a light beam from one opposing light emitting element 111. Such a configuration is also called an optical matrix method, and is generally used for an optical touch panel.

  First, the light shielding body detection device according to the comparative example 1 calculates the light shielding region 7-AC based on the light reception result by the light receiving element 112A when the light emitting element 111C emits light. Similarly, the light-shielding body detection device according to Comparative Example 1 calculates the light-shielding region 7-BD based on the light reception result by the light-receiving element 112D when the light-emitting element 111B emits light. And the light-shielding body detection apparatus which concerns on the comparative example 1 has the light-shielding body 6 located in the candidate area | regions 8-11, 8-12, 8-13, and 8-14 with which light-shielding area | region 7-AC and 7-BD overlap. Is detected.

  However, the light-shielding body detection apparatus according to Comparative Example 1 cannot specify which of the candidate regions 8-11, 8-12, 8-13, and 8-14 is the light-shielding bodies 6A and 6B. On the other hand, as shown in FIGS. 5 to 7, the light shielding body detection apparatus 10 according to the present embodiment further includes the case where the positions of the light shielding bodies 6A and 6B cannot be specified only by the first combination. By using the second combination, the positions of the light shields 6A and 6B can be specified.

  Further, in the light shielding body detection device according to Comparative Example 1, the light shielding regions of the rod-shaped light shielding body 6 placed diagonally and the rectangular light shielding body 6 having the diagonal length are the same. It is impossible to distinguish and detect the shape of the light shield 6. On the other hand, since the light emitting element 11 emits a light beam obliquely from each vertex in the element disposition portion 19, the light shielding element detection device 10 according to the present embodiment distinguishes and detects the shape of these light shielding elements 6. be able to. Therefore, the light-shielding body detection device 10 according to the present embodiment can distinguish between light shielding by a finger intended to be input and oblique bar-shaped light shielding by an unintended clothing sleeve and prevent erroneous input due to the clothing sleeve. can do.

  Unlike an electrostatic touch panel, an optical touch panel is a powerful input device in cold regions because it can detect a touch even when wearing gloves. Therefore, it is particularly effective that the light-shielding body detection device 10 according to the present embodiment can prevent malfunction caused by unintentional light-shielding due to the sleeve of the winter clothes. In addition, since the light shielding body detection device 10 can distinguish the clothes sleeve detected as the rod-shaped light shielding body 6 from the dot-shaped light shielding body 6 formed by the finger at the tip, the touch by the clothes sleeve is ignored. It is also possible to accept an input only by touching with a finger. Further, when detecting the sleeves of clothes as the rod-shaped light-shielding body 6, the light-shielding body detection device 10 can also perform a display to alert the customer.

  As described above, the effect of the light shielding body detection device 10 according to the present embodiment has been described in comparison with Comparative Example 1.

(Comparative Example 2)
FIG. 9 is an explanatory diagram illustrating detection of the light shield 6 by the light shield detection apparatus according to the second comparative example. As illustrated in FIG. 9, the light shield detecting device according to the comparative example 2 has a configuration in which the light emitting elements 11-1 and 11-2 are omitted from the light shield detecting device 10 according to the first embodiment. The light shield 6A is located in the candidate area 8-1, and the light shield 6B is located in the candidate area 8-3.

  The light shielding body detection apparatus according to the comparative example 2 calculates the light shielding regions 7-3 and 7-4, and the candidate regions 8-1, 8-2, 8-3, and the light shielding regions 7-3 and 7-4 overlap. It is detected that the light shield 6 is located at any one of 8-4. However, in the light shielding body detection apparatus according to Comparative Example 2, the light shielding bodies 6A and 6B are positioned in the candidate areas 8-1 and 8-3 as shown in FIG. 10 only in the light shielding areas 7-3 and 7-4. Or whether it is located in the candidate area 8-2 or 8-4.

  FIG. 10 is an explanatory diagram illustrating detection of the light shield 6 by the light shield detection apparatus according to the second comparative example. As shown in FIG. 10, the light shield 6A is located in the candidate area 8-4, and the light shield 6B is located in the candidate area 8-2. The light shielding body detection apparatus according to the comparative example 2 calculates the light shielding regions 7-3 and 7-4. Here, as shown in FIGS. 9 and 10, when the light shields 6A and 6B are located in the candidate areas 8-1 and 8-3 and when located in the candidate areas 8-2 and 8-4. The shapes of the light shielding regions 7-3 and 7-4 are not different. Therefore, the light-shielding body detection apparatus according to Comparative Example 2 cannot specify that the light-shielding bodies 6A and 6B are located in the candidate areas 8-1 and 8-3.

  On the other hand, the light shielding body detection apparatus 10 according to the present embodiment can specify the position of the light shielding body 6 by combining at least three light shielding regions 7. For example, when the light shield 6A is located in the candidate region 8-1 and the light shield 6B is located in the candidate region 8-3, as described with reference to FIGS. 10 can identify the positions of the light shields 6A and 6B. Further, when the light shield 6A is located in the candidate area 8-4 and the light shield 6B is located in the candidate area 8-2, the light shield detection apparatus 10 performs the light shielding as described with reference to FIG. The positions of the bodies 6A and 6B can be specified.

  FIG. 11 is an explanatory diagram illustrating detection of the light shield 6 by the light shield detection apparatus 10 according to the first embodiment. As shown in FIG. 11, the light shield 6A is located in the candidate area 8-4, the light shield 6B is located in the candidate area 8-2, and the light shield detection apparatus 10 includes the light shield areas 7-11 and 7- 12, 7-3 and 7-4 are calculated. Here, as shown in FIGS. 6 and 11, when the light shielding bodies 6A and 6B are located in the candidate areas 8-1 and 8-3, the light shielding areas 7-1 and 7-2 are calculated, while the candidate areas When located at 8-2 and 8-4, the light shielding areas 7-11 and 7-12 different from the light shielding areas 7-1 and 7-2 are calculated. And as shown in FIG. 11, the light-shielding body detection apparatus 10 is to the specific area | region 9-3, 9-4 which is a part which the light-shielding area | regions 7-11, 7-12, 7-3, 7-4 overlap. It can be detected that the light shields 6A and 6B are located.

  In the above description, the case where two light shields 6 are present has been described. In the following, with reference to FIGS. 12 and 13, the detection process when there are three light shields 6 is compared between the light shield detection apparatus according to Comparative Example 2 and the light shield detection apparatus 10 according to the present embodiment. To do.

  FIG. 12 is an explanatory diagram illustrating detection of the light shield 6 by the light shield detection apparatus according to the second comparative example. As shown in FIG. 12, the light shield 6A is located in the candidate area 8-1, the light shield 6B is located in the candidate area 8-3, and the light shield 6C is located in the candidate area 8-2. 2 calculates the light-shielding regions 7-3 and 7-4. Here, as shown in FIGS. 9, 10, and 12, when the light shield 6 is located in the candidate areas 8-1 and 8-3 or the candidate areas 8-2 and 8-4, the light shield 6 is a candidate. The shapes of the light shielding regions 7-3 and 7-4 are not different depending on the case where the regions 8-1, 8-2, and 8-3 are located. Therefore, the light shielding body detection device according to the comparative example 2 cannot distinguish between the case where there are two light shielding bodies 6 and the case where there are three light shielding bodies 6, and cannot specify the positions of the three light shielding bodies 6.

  FIG. 13 is an explanatory diagram illustrating detection of the light shield 6 by the light shield detection apparatus 10 according to the first embodiment. As shown in FIG. 13, the light shielding bodies 6A, 6B, and 6C exist at positions corresponding to FIG. 12, and the light shielding body detection device 10 includes the light shielding areas 7-21, 7-22, 7-3, and 7 -4 is calculated. The light shielding regions 7-21 and 7-22 are different from the light shielding regions 7-1 and 7-2 shown in FIG. 6 and the light shielding regions 7-11 and 7-12 shown in FIG. For this reason, as shown in FIG. 13, the light-shielding body detection device 10 includes specific areas 9-1, 9-2, which are portions where the light-shielding areas 7-21, 7-22, 7-3, and 7-4 overlap. It can be detected that the light shields 6A, 6B, and 6C are located at 9-5.

  As described above, the effect of the light shielding body detection device 10 according to the present embodiment has been described in comparison with the comparative example 2.

<3. Second Embodiment>
In the present embodiment, a malfunction due to extraneous light can be avoided by a detection process according to a sensing result by the sensing unit 15. First, with reference to FIG. 14, the malfunction by the external light which arises in a comparative example is demonstrated.

[3-1. Malfunction due to external light]
FIG. 14 is an explanatory diagram illustrating a malfunction caused by extraneous light in the light shielding body detection device according to Comparative Example 3. As shown in FIG. 14, the light-shielding body detection device according to Comparative Example 3 has a configuration in which the light-emitting elements 11-3 and 11-4 are omitted from the light-shielding body detection device 10 according to the first embodiment. In addition, the extraneous light 100 is inserted toward the light receiving element 12C, and the light receiving elements 12C-1 to 12C-2 receive the extraneous light 100. The light shield 6A is located in the candidate area 8-5, and the light shield 6B is located in the candidate area 8-6.

  Here, although the light emitted by the light emitting element 11-2 is blocked by the light blocking body 6A, the light receiving elements 12C-1 to 12C-2 receive the extraneous light 100. For this reason, the acquisition unit 14 acquires a light reception result indicating that the light receiving elements 12C-1 to 12C-2 have received light beams that are not received by the light emitting elements 11-2. In this way, since the light reception result is distorted, the calculation unit 16 cannot calculate the light shielding region 7-2-1 even though it can calculate the light shielding region 7-2-2. Therefore, the light shielding body detection apparatus according to Comparative Example 3 cannot detect the candidate area 8-5 using the light shielding area 7-2-1, and thus determines that the light shielding body 6A does not exist. Operation occurs.

  In the above, the malfunction by the external light which arises in the comparative example 3 was demonstrated. Next, with reference to FIG. 15, an operation of the light shielding body detection device 10 according to the present embodiment in an environment where external light exists will be described.

[3-2. Operation processing]
FIG. 15 is an explanatory diagram illustrating an operation of the light shielding body detection device 10 according to the second embodiment. As shown in FIG. 15, similarly to FIG. 14, the light receiving elements 12 </ b> C- 1 to 12 </ b> C- 2 receive the extraneous light 100. Further, the light shields 6A and 6B are located at positions corresponding to the candidate areas 8-5 and 8-6 in FIG. Here, as described in the third comparative example, the calculation unit 16 cannot calculate the light shielding region 7-2-1 using the extraneous light 100. Similarly, the calculation unit 16 cannot calculate the light shielding region 7-4 using the extraneous light 100.

  Under such an environment, the detection unit 17 detects the light shielding body 6 based on the light reception result by the light receiving elements 12 other than the light receiving elements 12C-1 to 12C-2 that have received the extraneous light. That is, the detection unit 17 combines the light shielding regions 7-1, 7-2-2, and 7-3 by the light receiving element 12 that does not receive extraneous light, and is a specific region that is a portion where these light shielding regions 7 overlap. It is detected that the light shields 6A and 6B are positioned at 9-5 and 9-6. Thus, the light shielding body detection device 10 can avoid malfunction in an environment where external light exists.

  In addition, in such an environment, the detection unit 17 includes the light receiving elements 12A, 12A, 12A, 12C, 12C, 12C, 12C, 12C, 12C, 12B, 12A, 12B, 12A, 12B, 12A, 12B The light blocking body 6 may be detected based on the light blocking area calculated from the light reception results of 12B and 12D. In this case, the detection unit 17 combines the light shielding regions 7-1, 7-2-2, and 7-3, and the light shielding members 6A and 6B are located in the specific regions 9-5 and 9-6, as described above. , And can be detected.

  In addition, in such an environment, the detection unit 17 detects the light emitting elements 11 other than the light emitting elements 11-2 and 11-4 that face the light receiving elements 12C-1 to 12C-2 that have received the extraneous light. The light shielding body 6 may be detected by combining the light shielding regions 7 with priority. In this case, the detection unit 17 preferentially combines the light shielding regions 7 for the light emitting elements 11-1 and 11-3. As a result, the detection unit 17 combines the light shielding regions 7-1, 7-2-2, and 7-3, and the light shielding members 6A and 6B are located in the specific regions 9-5 and 9-6, as described above. , And can be detected.

  The operation of the light shielding body detection device 10 according to the present embodiment has been described above.

<4. Summary>
As described above, the light shielding body detection device 10 according to an embodiment of the present invention can detect the light shielding body 6 more accurately even under a situation where it is difficult to detect the light shielding body 6. More specifically, the light shielding body detection device 10 combines each of the light shielding regions 6 by combining at least three light shielding regions even when the positional relationship between the plurality of light shielding bodies 6 is difficult to specify in the comparative example. The position can be specified. Further, the light shielding body detection device 10 specifies the position of the light shielding body 6 by not using the light reception result of the light receiving element 12 that has received the external light for detection even when the light reception result is distorted by the external light. can do. In addition, the light shielding body detection device 10 can also distinguish and detect the shape of the light shielding body 6 that has been difficult to distinguish by a generally used optical matrix method.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  In addition, it is possible to create a computer program for causing hardware such as a CPU, ROM, and RAM incorporated in the information processing apparatus to perform the same functions as the components of the above-described light shielding body detection device 10. A recording medium recording the computer program is also provided.

DESCRIPTION OF SYMBOLS 1 Automatic transaction apparatus 2 Passbook insertion discharge port 3 Card insertion discharge port 4 Coin insertion slot 5 Banknote insertion slot 10 Shading body detection apparatus 11, 11-1 to 11-4, 111, 111B, 111C Light emitting element 12, 12A-12D, 12B-1 to 12B-3, 12C-1, 12C-2, 112, 112A, 112D Light receiving element 13 Control unit 14 Acquisition unit 15 Sensing unit 16 Calculation unit 17 Detection unit 19 Element disposition unit 20 Display unit 100 External light 6 , 6A to 6C Light-shielding body 7, 7-1 to 7-4, 7-11, 7-12, 7-21, 7-22, 7-AC, 7-BD Light-shielding region 8-1 to 8-6, 8 -11 to 8-14 Candidate area 9-1 to 9-6 Specific area

Claims (11)

An element arrangement portion formed in a polygonal frame shape;
A light emitting element that emits light rays disposed near at least three vertices of the polygonal vertices in the element disposition portion;
A plurality of light receiving elements disposed on each side of the polygon in the element disposition portion to receive light emitted by the light emitting elements; and
When the light emitting element emits a light beam, an acquisition unit that acquires a light reception result by the light receiving element;
A detection unit that detects a light blocking body based on the light reception result acquired by the acquisition unit;
The light-shielding body detection apparatus provided with. The light-shielding body detection device further includes a calculation unit that calculates a light-shielding region where the light beam emitted from the light-emitting element is shielded by the light-shielding body based on the light reception result,
The light emitting elements emit light in order,
The calculation unit calculates the light shielding region for each light emitting element,
The light-shielding body detection device according to claim 1, wherein the detection unit detects a position and a shape of the light-shielding body by combining the light-shielding regions calculated by the calculation unit.   The light-shielding body detection device according to claim 2, wherein the detection unit detects a position and a shape of the light-shielding body by combining the light-shielding regions for at least three light-emitting elements arranged in the vicinity of different vertexes. .   The detection unit includes a first region where the light-shielding regions overlap for a first combination including any two of the light-emitting elements, and any two light-emitting elements different from the first combination. The light-shielding body is located in a third region overlapping with the second region where the light-shielding region overlaps for the second combination, and the shape of the third region is detected as the shape of the light-shielding member. Item 4. The light shielding body detection device according to Item 2 or 3. The light shield detection device further includes a sensing unit that senses a light receiving element that has received extraneous light based on the light reception result,
The said detection part detects the said light-shielding body based on the light-receiving result by the said light receiving elements other than the light receiving element sensed that the extraneous light was received by the said sensing part. Shading body detection device.   The detection unit detects the light blocking body based on a light reception result by the light receiving element disposed on a side other than the side on which the light receiving element sensed as having received extraneous light by the sensing unit; The light shielding body detection device according to claim 5.   The detection unit includes the light-shielding region for a light-emitting element other than the light-emitting element that can be received by the light-receiving element sensed as having received extraneous light by the sensing unit when emitting light. The light-shielding body detection device according to claim 5, wherein the light-shielding bodies are detected in combination with priority. The light beam is diffusive,
The light beam emitted by the light emitting element is received by the plurality of light receiving elements disposed in a range where the light beam diffuses on the side opposite to the apex where the light emitting element is disposed in the element disposition portion. The light-shielding body detection apparatus as described in any one of Claims 1-7. The element arrangement portion is formed in a quadrangular frame shape,
The said light emitting element is a light-shielding body detection apparatus as described in any one of Claims 1-8 arrange | positioned respectively near each vertex of the square in the said element arrangement | positioning part.   The light-shielding body detection apparatus according to claim 1, wherein the light beam is an infrared ray. An element arrangement portion formed in a polygonal frame shape;
A light emitting element that emits light rays disposed near at least three vertices of the polygonal vertices in the element disposition portion;
A plurality of light receiving elements disposed on each side of the polygon in the element disposition portion to receive light emitted by the light emitting elements; and
When the light emitting element emits a light beam, an acquisition unit that acquires a light reception result by the light receiving element;
A detection unit that detects a light blocking body based on the light reception result acquired by the acquisition unit;
An automatic transaction apparatus comprising:

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